[ Using *Isometric Contraction you can build up and strengthen more than 300 of your 500 basic muscles.]

Isometric Contraction - A contraction in which a muscle exerts force but does not change in length. Isometric contractions are common in activities such as yoga and stretching. Sourced exercise.about.com

Isometric Contraction — Muscle Actively Held at a Fixed Length

A third type of muscle contraction, isometric contraction, is one in which the muscle is activated, but instead of being allowed to lengthen or shorten, it is held at a constant length. An example of an isometric contraction would be carrying an object in front of you. The weight of the object would be pulling downward, but your hands and arms would be opposing the motion with equal force going upwards. Since your arms are neither raising or lowering, your biceps will be isometrically contracting. Sourced Muscle Physiology

[ Using Bullworker you can train your body throughout to produce a superb muscular system. Perhaps the most astonishing thing about the Bullworker System is that most of the exercises only last 6-8 seconds : and these exercise don't merely strengthen the muscles : they also strengthen internal organs. Use 60% of your strength in compressing or in traction.

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NOTE: Text included in [ ] indicates the information was taken directly off the Bullworker booklet I have here.

Check out the Bullworker Club! All past and present owners & users of the Bullworker Exercise Bar are welcome on this EG.All Bullworker manufacturers, distributors, vendors, and suppliers are also welcome on this EG.

I have been advised they have a 1980 X5 bullworker manual.

The state their purpose is to:

• To support, discuss, swap, and exchange Bullworker related information, resources, and training tips.
• To share past and present experiences with the Bullworker, especially any "Before & After" stories, training experiences, and photos.
• To share any other related on-line Bullworker websites, forums, etc...
• To locate, buy, sell, and trade new and used Bullworker Exercise Bars, spare parts, literature, training manuals, training charts, & training videos.
• This is a moderated group. All innapropriate material, Off Topic SPAM, and flames will be deleted by the moderator.

Enjoy! Keep working that Bullworker!

Here is another site featuring Bullworker exercises. Thanks Brent